Hi Jamie!
I will use it with a Flag.
73!
Tim K3LR
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of WW3S
Sent: Friday, October 18, 2019 6:31 AM
To: Tim Duffy
Cc: topband reflector
Subject: Re: Topband: BevFlex-4X - RX antenna
Configured how? I have th
Hi Dave,
In order to get benefits from diversity your 8-circle needs to be very
far away from your Beverages. If they are separated less than 500 feet
the fading will be nearly perfectly correlated and there will be no
diversity effect.
I get excellent diversity performance with my Beverag
And NEITHER of those have thing to do with a RF Ground at a specific
frequency
Dave
NR1DX
On 10/18/2019 11:36 AM, Roger D Johnson wrote:
I wish there some sort of inoculation that hams could get that would
allow
them to discern the difference between a power line safety ground
(required
Beverage performance is optimum when installed over poorly
conductive soil. Harold Beverage's first "Wave Antenna"
(later named after him) was a BOG several miles long (used at 50 kHz)
laid on sandy Long Island, NY soil.
In order to achieve good directivity (especially front-to-side ratio)
i
Sent from my iPhone
> On Oct 18, 2019, at 9:36 AM, Roger D Johnson wrote:
>
> The ham reflectors are full of accounts
> of putting in X number of ground rods, measuring the resistance at power line
> frequencies and being fooled into thinking they have a good lightning ground.
>
> 73, Roger
> __
Hi Folks,
The Hi-Z Antennas brand amps already have a path to drain static as they
are designed to produce 4 to 5 Volts DC on the element with an internal
voltage divider. Attaching another resistor would degrade the performance.
Not only does this protect from static but it is a great fi
I wish there some sort of inoculation that hams could get that would allow
them to discern the difference between a power line safety ground (required
by code) and a lightning ground that is designed to dissipate large amounts
of energy due to a lightning strike. The ham reflectors are full of acc
Jim
When you say it measured 70K was that DC, low frequency (60hz) A/C or at
1.8/3.5 Mhz RF?
Big difference.
'
Here two 5' rods about 2' apart measure about 2K DC but measure about
600 ohms at 1.8 Mhz...Still not sure how that correlates to a larger
earth RF ground. The other thing is RF gro
Thanks for the suggestion, Dave. I’m using DXE hardware and relay
boxes for switching, and twin lengths of WD-1A mil surplus telephone
cable for the wires. The lengths are spaced roughly 6 inches apart to
approximate 450 ohms. The end terminations are three 8ft ground rods
spaced out about 4 ft ap
Hello Mark!
I have the YCCC Hi-Z spaced at the compromised 60 ft. parameters to improve
80 & 40m operation - that was a mistake!
Go with the recommended 160m spacing. I plan to modify my Hi-Z for optimum
160m operation ASAP.
Since the Hi-Z sits on the ground, putting it out in the fall and bri
Jim
Poor front to back can indeed be a result of being too long. Although
w8JI would argue that at 700 feet your just about at optimum (1.5
wavelengths) I would think it would be easy to add an insulator /jumper
and a set of terminations and grounds at ~500 feet and see what the
difference
I’ve had good luck using fast zener diodes in series with ordinary
small silicon diodes (eg 1n914). The zener keeps the signal diode out
of the antenna circuit until the zener breakdown voltage, say 10V or
so, is reached.
73,
Jim w8zr
Sent from my iPhone
> On Oct 18, 2019, at 7:16 AM, Lee. KX4TT
GM Mark,
The easiest way to think of this is Diodes = Detectors; with high-powered RF
around, that becomes a Bad Idea. A possible alternative MAY be high-value
resistors to ground across the front end of the preamps. A representative
value would be 10 MΩ or greater, and I would match the resistance
On this general subject, I’m using bi-diectional beverages 720 ft
long, suspended 7 ft above sandy desert ground. The F/B ratio is poor
(not important for New Mexico) but I’m wondering if the antennas are
too long? I use them on 80m/160m.
73,
Jim w8zr
Sent from my iPhone
> On Oct 17, 2019, at 9:3
The Fall version of the Stew Perry events takes place this weekend.
The event starts at 1500Z on Oct 19 UTC and runs for 24 hours. Exchange
your grid square which enables the distance based scoring magic.
Conditions have been very promising this season so far - with many European
openings from t
Tim
Which antenna will you be using ; BOG, Beverage or a FLAG/Pennant
I have been doing some experimenting with the BF-4X with BOGs and
Beverages in both very poor sandy soil and then again at a water front
(salt) canal location. Eventually I will get around to trying out a
FLAG/Pennant style
Configured how? I have the JK version, which looks very similar, except instead
of internal jumpers, they have different external connecting points, depending
on the configuration...I’ve used it on my small lot configured as an EWE, and
worked a lot of dx I could never hear on the TX antenna...
Hello Mark:
Installing diodes can cause severe problems with nearby broadcast stations.
During the summer months and lightning months I remove my preamps from the
antenna elements to protect them.
I am now just getting them installed tomorrow morning to prepare for the Fall
Stew contest on Sat
HI Dave
There is no doubt that a diversity setup with good Beverages and the 160 meter
optimized 8 circle from HI-Z will be a killer RX system.
Lots of work - but very worth the effort.
I LOVE my HI-Z 8 circle!
73
Tim K3LR
-Original Message-
From: Topband [mailto:topband-boun...@conte
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